9 Sagittarii: uncovering an O-type spectroscopic binary with an 8.6 year period

in Astronomy and Astrophysics (2012), 542

Context. The O-type object 9 Sgr is a well-known synchrotron radio emitter. This feature is usually attributed to colliding-wind binary systems, but 9 Sgr was long considered a single star. <BR /> Aims ... [more ▼]

Context. The O-type object 9 Sgr is a well-known synchrotron radio emitter. This feature is usually attributed to colliding-wind binary systems, but 9 Sgr was long considered a single star. <BR /> Aims: We have conducted a long-term spectroscopic monitoring of this star to investigate its multiplicity and search for evidence for wind-wind interactions. <BR /> Methods: Radial velocities are determined and analysed using various period search methods. Spectral disentangling is applied to separate the spectra of the components of the binary system. <BR /> Results: We derive the first ever orbital solution of 9 Sgr. The system is found to consist of an O3.5 V((f[SUP]+[/SUP])) primary and an O5-5.5 V((f)) secondary moving around each other on a highly eccentric (e = 0.7), 8.6 year orbit. The spectra reveal no variable emission lines that could be formed in the wind interaction zone in agreement with the expected properties of the interaction in such a wide system. <BR /> Conclusions: Our results provide further support to the paradigm of synchrotron radio emission from early-type stars being a manifestation of interacting winds in a binary system. Based on observations collected at the European Southern Observatory (La Silla, Chile and Cerro Paranal, Chile) and the San Pedro Mártir observatory (Mexico).Appendix A is available in electronic form at <A href="http://www.aanda.org">http://www.aanda.org</A>The reduced spectra are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/542/A95">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/542/A95</A> [less ▲]

9. Environnement - 2. La culture en association de froment et de légumineuses

in Livre Blanc: Céréales - Gembloux (2011, February 23)

99m Tc-MIBI pinhole SPECT in primary hyperparathyroidism: comparison with conventional SPECT, planar scintigraphy and ultrasonography

in European Journal of Nuclear Medicine and Molecular Imaging (2008), 35(3), 637-643

A la découverte du charbonnage de Blégny-Trembleur et de l'Entre-Vesdre-et-Meuse

Book - Livret guide du Complexe touristique du charbonnage de Blégny-Trembleur (1982)

Livret-guide d'un charbonnage transformé en complexe touristique ; 5 parties : Blégny-Trembleur et sa région, le charbon : considérations géologiques, l'exploitation du charbon, l'histoire du charbonnage ... [more ▼]

Livret-guide d'un charbonnage transformé en complexe touristique ; 5 parties : Blégny-Trembleur et sa région, le charbon : considérations géologiques, l'exploitation du charbon, l'histoire du charbonnage et les mineurs [less ▲]

A Bruxelles, quand l'expérience balaie des critères préconçus d'évaluation

in La Santé de l'Homme (2007), (390), 41-42

A case of sylvatic dermatophytosis due to Trichophyton mentagrophytes in a cat

in Pratique médicale & chirurgicale de l'animal de compagnie (2005), 40

A chacun son axe du mal

Article for general public (2002)

L'article interroge la théorie de la "guerre juste" de Michael Walzer et montre qu'il est impossible de proposer une guerre "juste" autrement que d'un point de vue partisan. Ce point de vue partisan, dans ... [more ▼]

L'article interroge la théorie de la "guerre juste" de Michael Walzer et montre qu'il est impossible de proposer une guerre "juste" autrement que d'un point de vue partisan. Ce point de vue partisan, dans le cas américain, finit par amener les victimes à ressmbler à leurs bourreaux, et l'article conclut en citant la philosophe américaine Anne Snitow (Dissent) pour qui il faut non pas "épouser l'ennemi" mais "divorcer d'avec lui" : cesser de vouloir lui ressembler. [less ▲]

A comparison of somatic cell count and antimicrobial susceptibility of subclinical mastitis pathogens in organic and conventional dairy herds

in Annales de Médecine Vétérinaire (2005), 149(3), 173-182

A comparison of somatic cell count and antimicrobial susceptibility of subclinical mastitis pathogens in organic and conventional dairy herds.Bovine subclinical mastitis is the most important disease ... [more ▼]

A comparison of somatic cell count and antimicrobial susceptibility of subclinical mastitis pathogens in organic and conventional dairy herds.Bovine subclinical mastitis is the most important disease affecting dairy cows. The fluctuating increase in somatic cell count (SCC) that occurs causes major economic losses in dairy industry. This comparative study between conventional and organic dairy herds was conducted in the aim to better characterize which consequences might have different management practices on SCC but also on the frequency of pathogens isolated and their antimicrobial susceptibility. Four conventional and four organic herds, with bulk milk SCC >300x103cells/ml were selected, in which respectively 47 and 44 cows were investigated. Each quarter was sampled 3 times at 15 days interval for SCC, microbiological analysis and antimicrobial susceptibility. In both herd categories, major pathogens isolated were by order of importance Streptococcus uberis, Staphylococcus aureus and Streptococcus dysgalactiae with a great impact on SCC. Coagulase negative staphylococci were the most frequent minor germs and had a moderated but real impact on SCC. In certified organic dairy farms, the three most frequently isolated major pathogens were significantly more susceptible to antimicrobials in vitro. This study suggests that the limited use of antibiotics in organic dairy herds could explain, at least in part, the lower resistance obtained from analysed isolates. [less ▲]

A défaut d'un groupe

in Collectif (Ed.) Par défaut : états d'un collectif sans parenté (2003)

Le texte s'appuie sur des entretiens avec huit artistes qui ont exposé ensemble sans constituer un groupe formel. A travers une analyse structurale des thèmes issus de l'ensemble des entretiens et de ... [more ▼]

Le texte s'appuie sur des entretiens avec huit artistes qui ont exposé ensemble sans constituer un groupe formel. A travers une analyse structurale des thèmes issus de l'ensemble des entretiens et de leurs interrelations, le texte essaye de définir l'identité du groupe autour d'un certain nombre d'antinomies. [less ▲]

A experiência Pedagógica «Renovação do Ensino Elementar - Desenvolvimento Corporal das Crianças dos 2,5 Anos aos 12 Anos»

in Boletim Sociedade Portuguesa de Educação Física (1995), 12(2), 31-58

This paper presents the methodology and main results of a research program aiming to identify the effect of a daily physical education project implemented in the French speaking part of Belgium.